Lindsay Has Another Sister?!

It wouldn't surprise us!

Life & Style reports that 15-year-old Ashley Horn's birth certificate names Michael Lohan as her father!

Ashley's mother Kristi had an affair with Michael in the '90s when he was separated from his wife Dina Lohan. He has denied that he is Ashley's father when they first came forward back in 2008.

Apparently Michael didn't show up for a court hearing in December 2008 so the judge ruled that he could be added to the birth certificate. But Michael said recently, "I'd be glad to take a DNA test!"

Kristi also claims he owes $300,000 in back child support!

As for Ashley Horn, she says of Michael:

"I do not trust him, and I don't want to be around him or part of his life. I could never call Michael Lohan 'Dad.' A dad is a person who is there for you and takes care of you.

"I wanted to help Lindsay in some way, but what was I supposed to do? I don't even know how to contact her."

We have a feeling La Loca probably doesn't want to hear from her father's potential love child, but it's the thought that counts!

Ha!

[Image via WENN.]